how shadows are formed

2. Light rays travel in straight lines, radiating outLight rays travel in straight lines, radiating out
from the light source.from the light source.
If rays are blocked by an opaque object a shadowIf rays are blocked by an opaque object a shadow
forms where the light cannot reach.forms where the light cannot reach.
If the light source is moved closer to the object,If the light source is moved closer to the object,
more light is blocked and a larger shadow ismore light is blocked and a larger shadow is
formed.formed.
SHADOWS ARE FORMED:SHADOWS ARE FORMED:
SUN
RIS
E

3. {{ {{
This shadowThis shadow
is biggeris bigger
because thebecause the
light source islight source is
closer to thecloser to the
objetobjet
FIRST SHADOWFIRST SHADOW
EXPERIMENTEXPERIMENT

4. {{ {{
This shadowThis shadow
is smalleris smaller
because thebecause the
light source islight source is
far far way tofar far way to
the objet.the objet.
SECOND SHADOWSECOND SHADOW
EXPERIMENTEXPERIMENT